摘要
通过7年的草地初级生产力定位观测表明:脚苔草草旬地上生物量动态符合logistic曲线,产量高峰出现在8月中旬。在生长季干鲜比变动在30％～60％之间,牧草的返青、生长发育对水热条件具有很大的依赖性,6月中旬至7月中旬是草群地上生物量累积的盛期;拟合了草群粗蛋白质、粗纤维百分含量方程。
This paper presents the location monitoring of primary productivity in Carex pediformis meadow during 1982～1987. After further analysis, the results are as follows: The ground biomass dynamics of Carex pediformis meadow is in conformity with the Logistic curve—y =182.85/(1+40.34e^(-0.0931t), and the maximum production is at the middle ten days in August. During the growth season, the ratio of hay and fresh herbage records between 30 %～60%, and accords with the y=-24. 595+8. 973x. The returning green growth and development of herbage depend largely on water and heat. The prosperous period of accumlation of grass biomass on the ground lies between the middle ten days in June to the middle ten in July. The percentage content of crude protein of the grass accords with the y=28. 288-2. 424x, the percentage content of crude fiber of the grass accords with y=13. 018+2. 309 (x indicates month).
出处
《中国草地》
CSCD
1992年第5期27-31,共5页
Grassland of China
关键词
脚苔草
草地
生物量
Carex pediformis meadow
biomass dynamics
nutrition dynamics
great Xingan mountains
